Cushion cap for tools



M y 9. J. B. cRoFooT CUSHION CAP FOR TOOLS Filed March 15,, 1928 I In vemor John B.- Crofooz.

Patented May 21, 1929.

spires OFFH CUSHION CAP FOR TOOLS.

Application filed. Maren 16, 1928. Serial, No. 262,255 11 :1

The present invention is directed to improvements in cushion caps for percussion operated tools such as stapling machines and the like, and has for its general object the provision of a device of the kind described that willrbe efficient in operation, of comparatively" low manufacturing cost and particularly adapted to save the hand of the operator from pain or discomfort when operating the device.

Another object of my invention is to provide a cushion cap for stapling machines with means permitting its almost continuous use without injury to the comparatively soft hands of those engaged in ofiice work.

Other objects and advantages of my invention will appear more fully hereinafter when taken in connection with the accompanying drawings, in which: I

Figure 1 is a side elevation of my device asapplied to a conventional stapling ma-- chine.

Figure 2 is a plan view thereof.

Figure 3 is a sectional view taken on line 3-3 of Figure 1 looking in the direction of the arrows.

Referring more particularly to the drawings in which similar characters of reference designate corresponding parts in the several views, A designates a stapling machine having an operating head 6 to which is applied the cushion cap B embodying my invention.

The cap B comprising my structure is formed of soft, pliable rubber molded to provide an upper cup shaped recess 7, formed by the circumferential wall 7 having an overlapping flange 0r lip 8 adapted to aid in securing the rubber sponge 9. Formed unitary with the cap and 'on the bottom thereof is a comparatively shallow cup shaped recess 10, the walls 11 of which are likewise adapted to overlap and secure the operating head 6 which latter forms a part of the plunger hammer 12, this element being square in configuration to register with and be slidably received by a square groove 13 in an end wall 14 of the stapling machine A.

As best shown in Figure 3, it will. be seen that the operating handle 6 is resilientl maintained in raised position to be operate by the action of coil spring 15, which latter is seated in a recess 16 of a collar 17 having a bottom hole 18 accommodating the square shank 12. It will be understood, that the details of the stapling machine in themselves form no part of my invention, but are merely set forth With a View to a more clear expla nation of the functions and mode of operation of my cushion cap B.

The operation of stapling nfachines is, of course, well known, it being understood that a supply of staples is sequentially fed to the plunger hammer 12 as the latter applies them individually to the various papers and attached or stapled toconjunction with the pliable and resilient wall 7 which serves to partially enclose the sponge 9. The properties of the rubber sponge are of course too well known to need description. The softness and pliancy of this product particularly suits it for use as a shock absorbing medium in the capacity above indicated.

By actual experience, I have found no tendency towards lameness of the hand of those constantly. engaged in manipulation of stapling. machines when my cushion cap has been applied to the heads of these devices.

It will be understood, of course, that minor changes of construction and relative disposition of parts may be made without departing from the spirit or scope of my invention as illustrated in the drawings and set forth in the specification; hence, I do not confine myself literally to the exact details as described, but wish to avail myself of such variations and modifications as fairly lie within the province of the appended claims.

Wl1at I claim as new and desire to secure by Letters Patent is:

1. A rubber cushion cap comp-rising a unitary pliable structure having a bottom socket adapted to clampin'gly receive the head of a stapling machine, a top socket, a resilient shock absorbing porous element in said top socket, and a flange on the wall of said top socket whereby said porous element is removably secured thereto:

2. A cushion cap comprising a unitary 5 rubber structure having a bottom socket formed by a downwardly and inwardly projecting circumferential wall, a top socket formed by an upper and inwardly projecting circumferential wall, said bottom socket arrangedto clampingly receive the operating 10 head of a stapling machine, and a rubber sponge removably secured in saidtop socket.

In testimony whereof I have signed my name to this specification.

JOHN B. GROFOOT. 

